The Cacheability Engine, both as a service and a program, is provided 'as is', without warranty of any kind. Although it is believed that it functions as intended, it should only be thought of as an instrument that gives an indication of how caches may interact with a particular Web site.
Although the Engine may be copied and distributed freely, it may not be modified in any way (including the URL references that it contains). This is to protect the end users; much care has been taken to assure that it returns the best possible results. This restriction applies to both public Engines and redistributions of the software.
If you would like to produce a derivative work (whether free or commercial), please contact the author to discuss the project.
The Engine has been tested on Unix and Windows NT. The source distribution requires Python 1.5.2 or later to be installed.
Although Python is easy to install, you can also get a pre-packaged, single-file binary for many platforms, which is suitable for running the Engine. See the mxCGIPython page for more information.
The most important consideration is to have a synchronised clock; NTP is suggested.
It's a bad idea to run the Engine behind any form of Web proxy, other than a straight tunnel (like TIS's http-gw). This includes so-called transparent proxies; make sure you're not downstream from one.
Currently, the only available distribution is in source form; platform binaries may be available in the future, depending on demand.
The current version is 1.30.
Be sure to have a look at the README file included.